{"id":51170,"date":"2024-12-03T17:27:58","date_gmt":"2024-12-03T09:27:58","guid":{"rendered":"https:\/\/fwq.ai\/blog\/51170\/"},"modified":"2024-12-03T17:27:58","modified_gmt":"2024-12-03T09:27:58","slug":"linux%e6%9c%8d%e5%8a%a1%e5%99%a8%e5%ae%89%e5%85%a8%e7%9a%84%e5%9f%ba%e7%9f%b3%ef%bc%9a%e7%90%86%e8%a7%a3%e4%b8%8e%e4%bd%bf%e7%94%a8%e8%bf%99%e4%ba%9b%e9%87%8d%e8%a6%81%e5%91%bd%e4%bb%a4-2","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/51170\/","title":{"rendered":"Linux\u670d\u52a1\u5668\u5b89\u5168\u7684\u57fa\u77f3\uff1a\u7406\u89e3\u4e0e\u4f7f\u7528\u8fd9\u4e9b\u91cd\u8981\u547d\u4ee4"},"content":{"rendered":"<p><b><\/b>     <\/p>\n<h1>Linux\u670d\u52a1\u5668\u5b89\u5168\u7684\u57fa\u77f3\uff1a\u7406\u89e3\u4e0e\u4f7f\u7528\u8fd9\u4e9b\u91cd\u8981\u547d\u4ee4<\/h1>\n<p>\u672c\u7bc7\u6587\u7ae0\u7ed9\u5927\u5bb6\u5206\u4eab\u300aLinux\u670d\u52a1\u5668\u5b89\u5168\u7684\u57fa\u77f3\uff1a\u7406\u89e3\u4e0e\u4f7f\u7528\u8fd9\u4e9b\u91cd\u8981\u547d\u4ee4\u300b\uff0c\u8986\u76d6\u4e86\u6587\u7ae0\u7684\u5e38\u89c1\u57fa\u7840\u77e5\u8bc6\uff0c\u5176\u5b9e\u4e00\u4e2a\u8bed\u8a00\u7684\u5168\u90e8\u77e5\u8bc6\u70b9\u4e00\u7bc7\u6587\u7ae0\u662f\u4e0d\u53ef\u80fd\u8bf4\u5b8c\u7684\uff0c\u4f46\u5e0c\u671b\u901a\u8fc7\u8fd9\u4e9b\u95ee\u9898\uff0c\u8ba9\u8bfb\u8005\u5bf9\u81ea\u5df1\u7684\u638c\u63e1\u7a0b\u5ea6\u6709\u4e00\u5b9a\u7684\u8ba4\u8bc6(B \u6570)\uff0c\u4ece\u800c\u5f25\u8865\u81ea\u5df1\u7684\u4e0d\u8db3\uff0c\u66f4\u597d\u7684\u638c\u63e1\u5b83\u3002<\/p>\n<p>Linux\u670d\u52a1\u5668\u5b89\u5168\u7684\u57fa\u77f3\uff1a\u7406\u89e3\u4e0e\u4f7f\u7528\u8fd9\u4e9b\u91cd\u8981\u547d\u4ee4<\/p>\n<p>Linux\u670d\u52a1\u5668\u5728\u73b0\u4ee3\u4e92\u8054\u7f51\u65f6\u4ee3\u4e2d\u626e\u6f14\u7740\u81f3\u5173\u91cd\u8981\u7684\u89d2\u8272\uff0c\u5b83\u4eec\u4e0d\u4ec5\u9700\u8981\u63d0\u4f9b\u7a33\u5b9a\u53ef\u9760\u7684\u670d\u52a1\uff0c\u8fd8\u9700\u8981\u5177\u5907\u5f3a\u5927\u7684\u5b89\u5168\u6027\u3002\u4e3a\u4e86\u4fdd\u62a4\u670d\u52a1\u5668\u514d\u53d7\u6076\u610f\u653b\u51fb\u548c\u672a\u7ecf\u6388\u6743\u7684\u8bbf\u95ee\uff0c\u4e86\u89e3\u5e76\u6b63\u786e\u4f7f\u7528\u4e00\u4e9b\u91cd\u8981\u7684\u547d\u4ee4\u662f\u81f3\u5173\u91cd\u8981\u7684\u3002\u672c\u6587\u5c06\u4ecb\u7ecd\u51e0\u4e2a\u5e38\u7528\u7684\u547d\u4ee4\uff0c\u7528\u4e8e\u52a0\u5f3aLinux\u670d\u52a1\u5668\u7684\u5b89\u5168\u6027\uff0c\u5e76\u63d0\u4f9b\u76f8\u5e94\u7684\u4ee3\u7801\u793a\u4f8b\u3002<\/p>\n<ol>\n<li>\u7f51\u7edc\u5b89\u5168\u547d\u4ee4<\/li>\n<\/ol>\n<p>1.1 iptables\uff1a\u8fd9\u662f\u4e00\u4e2a\u975e\u5e38\u5f3a\u5927\u7684\u7f51\u7edc\u5b89\u5168\u547d\u4ee4\uff0c\u7528\u4e8e\u914d\u7f6eLinux\u670d\u52a1\u5668\u7684\u9632\u706b\u5899\u3002\u901a\u8fc7\u4f7f\u7528iptables\uff0c\u6211\u4eec\u53ef\u4ee5\u5b9a\u4e49\u54ea\u4e9b\u7f51\u7edc\u8fde\u63a5\u662f\u5141\u8bb8\u7684\uff0c\u54ea\u4e9b\u662f\u7981\u6b62\u7684\u3002\u4e0b\u9762\u662f\u4e00\u4e2a\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u7981\u6b62\u6240\u6709\u7684\u8f93\u5165\u8fde\u63a5\uff0c\u53ea\u5141\u8bb8\u67d0\u4e2a\u7279\u5b9aIP\u5730\u5740\u7684\u8fde\u63a5\u3002<\/p>\n<pre>iptables -P INPUT DROP\niptables -A INPUT -s \u5141\u8bb8\u7684IP\u5730\u5740 -j ACCEPT<\/pre>\n<p>1.2 tcpdump\uff1a\u8fd9\u662f\u4e00\u4e2a\u7f51\u7edc\u5206\u6790\u547d\u4ee4\uff0c\u7528\u4e8e\u6355\u83b7\u548c\u5206\u6790\u7f51\u7edc\u6d41\u91cf\u3002\u5b83\u80fd\u591f\u5e2e\u52a9\u6211\u4eec\u68c0\u6d4b\u548c\u6392\u67e5\u53ef\u80fd\u7684\u7f51\u7edc\u5b89\u5168\u95ee\u9898\u3002\u4e0b\u9762\u662f\u4e00\u4e2a\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u4f7f\u7528tcpdump\u6355\u83b7\u6240\u6709\u8fdb\u5165\u670d\u52a1\u5668\u7684SSH\u8fde\u63a5\u3002<\/p>\n<pre>tcpdump -i eth0 port 22<\/pre>\n<ol>\n<li>\u7528\u6237\u7ba1\u7406\u547d\u4ee4<\/li>\n<\/ol>\n<p>2.1 adduser\uff1a\u8fd9\u4e2a\u547d\u4ee4\u7528\u4e8e\u6dfb\u52a0\u65b0\u7528\u6237\u8d26\u6237\u3002\u5728Linux\u670d\u52a1\u5668\u4e2d\uff0c\u4e3a\u6bcf\u4e2a\u7528\u6237\u5206\u914d\u72ec\u7acb\u7684\u8d26\u6237\u5e76\u9650\u5236\u4ed6\u4eec\u7684\u6743\u9650\u662f\u81f3\u5173\u91cd\u8981\u7684\u3002\u4e0b\u9762\u662f\u4e00\u4e2a\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u4f7f\u7528adduser\u547d\u4ee4\u521b\u5efa\u4e00\u4e2a\u65b0\u7528\u6237\u3002<\/p>\n<pre>adduser \u65b0\u7528\u6237\u540d<\/pre>\n<p>2.2 usermod\uff1a\u8fd9\u4e2a\u547d\u4ee4\u7528\u4e8e\u4fee\u6539\u73b0\u6709\u7528\u6237\u8d26\u6237\u7684\u8bbe\u7f6e\u3002\u901a\u8fc7usermod\uff0c\u6211\u4eec\u53ef\u4ee5\u4fee\u6539\u7528\u6237\u7684\u5bc6\u7801\u3001\u7528\u6237\u7ec4\u3001\u4e3b\u76ee\u5f55\u7b49\u3002\u4e0b\u9762\u662f\u4e00\u4e2a\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u4f7f\u7528usermod\u547d\u4ee4\u5c06\u4e00\u4e2a\u7528\u6237\u6dfb\u52a0\u5230sudo\u7ec4\u3002<\/p>\n<pre>usermod -aG sudo \u7528\u6237\u540d<\/pre>\n<ol>\n<li>\u6587\u4ef6\u548c\u6743\u9650\u7ba1\u7406\u547d\u4ee4<\/li>\n<\/ol>\n<p>3.1 chmod\uff1a\u8fd9\u4e2a\u547d\u4ee4\u7528\u4e8e\u4fee\u6539\u6587\u4ef6\u6216\u76ee\u5f55\u7684\u6743\u9650\u3002\u5728Linux\u670d\u52a1\u5668\u4e2d\uff0c\u9650\u5236\u6587\u4ef6\u548c\u76ee\u5f55\u7684\u8bbf\u95ee\u6743\u9650\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002\u4e0b\u9762\u662f\u4e00\u4e2a\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u4f7f\u7528chmod\u547d\u4ee4\u5c06\u4e00\u4e2a\u811a\u672c\u6587\u4ef6\u8bbe\u7f6e\u4e3a\u53ea\u6709\u6240\u6709\u8005\u53ef\u4ee5\u6267\u884c\u3002<\/p>\n<pre>chmod 700 \u811a\u672c\u6587\u4ef6\u540d<\/pre>\n<p>3.2 chown\uff1a\u8fd9\u4e2a\u547d\u4ee4\u7528\u4e8e\u4fee\u6539\u6587\u4ef6\u6216\u76ee\u5f55\u7684\u6240\u6709\u6743\u3002\u901a\u8fc7chown\uff0c\u6211\u4eec\u53ef\u4ee5\u5c06\u6587\u4ef6\u6216\u76ee\u5f55\u7684\u6240\u6709\u8005\u548c\u6240\u5c5e\u7528\u6237\u7ec4\u4fee\u6539\u4e3a\u6307\u5b9a\u7684\u7528\u6237\u548c\u7ec4\u3002\u4e0b\u9762\u662f\u4e00\u4e2a\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u4f7f\u7528chown\u547d\u4ee4\u5c06\u4e00\u4e2a\u76ee\u5f55\u7684\u6240\u6709\u6743\u4fee\u6539\u4e3a\u67d0\u4e2a\u7528\u6237\u3002<\/p>\n<pre>chown -R \u7528\u6237\u540d \u76ee\u5f55\u540d<\/pre>\n<ol>\n<li>\u65e5\u5fd7\u7ba1\u7406\u547d\u4ee4<\/li>\n<\/ol>\n<p>4.1 tail\uff1a\u8fd9\u4e2a\u547d\u4ee4\u7528\u4e8e\u67e5\u770b\u65e5\u5fd7\u6587\u4ef6\u7684\u5c3e\u90e8\u5185\u5bb9\u3002\u901a\u8fc7\u4f7f\u7528tail\uff0c\u6211\u4eec\u53ef\u4ee5\u5b9e\u65f6\u67e5\u770b\u65e5\u5fd7\u6587\u4ef6\u7684\u6700\u65b0\u66f4\u65b0\u3002\u4e0b\u9762\u662f\u4e00\u4e2a\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u4f7f\u7528tail\u547d\u4ee4\u67e5\u770b\/var\/log\/auth.log\u6587\u4ef6\u7684\u6700\u540e10\u884c\u3002<\/p>\n<pre>tail -n 10 \/var\/log\/auth.log<\/pre>\n<p>4.2 grep\uff1a\u8fd9\u4e2a\u547d\u4ee4\u7528\u4e8e\u5728\u6587\u672c\u6587\u4ef6\u6216\u8f93\u51fa\u4e2d\u67e5\u627e\u7279\u5b9a\u7684\u5b57\u7b26\u4e32\u3002\u901a\u8fc7\u4f7f\u7528grep\uff0c\u6211\u4eec\u53ef\u4ee5\u5728\u65e5\u5fd7\u6587\u4ef6\u4e2d\u5feb\u901f\u641c\u7d22\u548c\u8fc7\u6ee4\u5173\u952e\u4fe1\u606f\u3002\u4e0b\u9762\u662f\u4e00\u4e2a\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u4f7f\u7528grep\u547d\u4ee4\u5728\/var\/log\/auth.log\u6587\u4ef6\u4e2d\u67e5\u627e\u5305\u542b&#8221;Failed password&#8221;\u7684\u884c\u3002<\/p>\n<pre>grep \"Failed password\" \/var\/log\/auth.log<\/pre>\n<p>\u603b\u7ed3\uff1a<\/p>\n<p>Linux\u670d\u52a1\u5668\u5b89\u5168\u7684\u57fa\u77f3\u662f\u6df1\u5165\u7406\u89e3\u5e76\u6b63\u786e\u4f7f\u7528\u4e00\u4e9b\u91cd\u8981\u7684\u547d\u4ee4\u3002\u672c\u6587\u4ecb\u7ecd\u4e86\u7f51\u7edc\u5b89\u5168\u3001\u7528\u6237\u7ba1\u7406\u3001\u6587\u4ef6\u548c\u6743\u9650\u7ba1\u7406\u4ee5\u53ca\u65e5\u5fd7\u7ba1\u7406\u7b49\u65b9\u9762\u7684\u5e38\u7528\u547d\u4ee4\uff0c\u5e76\u63d0\u4f9b\u4e86\u76f8\u5e94\u7684\u4ee3\u7801\u793a\u4f8b\u3002\u901a\u8fc7\u5b66\u4e60\u548c\u638c\u63e1\u8fd9\u4e9b\u547d\u4ee4\uff0c\u6211\u4eec\u53ef\u4ee5\u66f4\u597d\u5730\u4fdd\u62a4Linux\u670d\u52a1\u5668\u514d\u53d7\u6076\u610f\u653b\u51fb\u548c\u672a\u7ecf\u6388\u6743\u7684\u8bbf\u95ee\uff0c\u63d0\u9ad8\u670d\u52a1\u5668\u7684\u5b89\u5168\u6027\u3002<\/p>\n<p>\u6587\u4e2d\u5173\u4e8e\u5b89\u5168(Security),\u670d\u52a1\u5668(Server),\u547d\u4ee4(Command)\u7684\u77e5\u8bc6\u4ecb\u7ecd\uff0c\u5e0c\u671b\u5bf9\u4f60\u7684\u5b66\u4e60\u6709\u6240\u5e2e\u52a9\uff01\u82e5\u662f\u53d7\u76ca\u532a\u6d45\uff0c\u90a3\u5c31\u52a8\u52a8\u9f20\u6807\u6536\u85cf\u8fd9\u7bc7\u300aLinux\u670d\u52a1\u5668\u5b89\u5168\u7684\u57fa\u77f3\uff1a\u7406\u89e3\u4e0e\u4f7f\u7528\u8fd9\u4e9b\u91cd\u8981\u547d\u4ee4\u300b\u6587\u7ae0\u5427\uff0c\u4e5f\u53ef\u5173\u6ce8\u7c73\u4e91\u516c\u4f17\u53f7\u4e86\u89e3\u76f8\u5173\u6280\u672f\u6587\u7ae0\u3002<\/p>\n<dl>\n<dt><\/dt>\n<dd>\n   PHP\u5982\u4f55\u5b9e\u73b0\u6301\u7eed\u76d1\u542cRedis\u7684\u6d88\u606f\u8ba2\u9605\u5e76\u53d1\u9001\u63a8\u9001\u901a\u77e5\uff1f\n <\/dd>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"<p>Linux\u670d\u52a1\u5668\u5b89\u5168\u7684\u57fa\u77f3\uff1a\u7406\u89e3\u4e0e\u4f7f\u7528\u8fd9\u4e9b\u91cd\u8981\u547d\u4ee4 \u672c\u7bc7\u6587\u7ae0\u7ed9\u5927\u5bb6\u5206\u4eab\u300aLinux\u670d\u52a1\u5668\u5b89\u5168\u7684\u57fa\u77f3\uff1a\u7406\u89e3\u4e0e\u4f7f\u7528\u8fd9\u4e9b\u91cd\u8981\u547d\u4ee4\u300b\uff0c\u8986\u76d6\u4e86\u6587\u7ae0\u7684\u5e38\u89c1\u57fa\u7840\u77e5\u8bc6\uff0c\u5176\u5b9e\u4e00\u4e2a\u8bed\u8a00\u7684\u5168\u90e8\u77e5\u8bc6\u70b9\u4e00\u7bc7\u6587\u7ae0\u662f\u4e0d\u53ef\u80fd\u8bf4\u5b8c\u7684\uff0c\u4f46\u5e0c\u671b\u901a\u8fc7\u8fd9\u4e9b\u95ee\u9898\uff0c\u8ba9\u8bfb\u8005\u5bf9\u81ea\u5df1\u7684\u638c\u63e1\u7a0b\u5ea6\u6709\u4e00\u5b9a\u7684\u8ba4\u8bc6(B \u6570)\uff0c\u4ece\u800c\u5f25\u8865\u81ea\u5df1\u7684\u4e0d\u8db3\uff0c\u66f4\u597d\u7684\u638c\u63e1\u5b83\u3002 Linux\u670d\u52a1\u5668\u5b89\u5168\u7684\u57fa\u77f3\uff1a\u7406\u89e3\u4e0e\u4f7f\u7528\u8fd9\u4e9b\u91cd\u8981\u547d\u4ee4 Linux\u670d\u52a1\u5668\u5728\u73b0\u4ee3\u4e92\u8054\u7f51\u65f6\u4ee3\u4e2d\u626e\u6f14\u7740\u81f3\u5173\u91cd\u8981\u7684\u89d2\u8272\uff0c\u5b83\u4eec\u4e0d\u4ec5\u9700\u8981\u63d0\u4f9b\u7a33\u5b9a\u53ef\u9760\u7684\u670d\u52a1\uff0c\u8fd8\u9700\u8981\u5177\u5907\u5f3a\u5927\u7684\u5b89\u5168\u6027\u3002\u4e3a\u4e86\u4fdd\u62a4\u670d\u52a1\u5668\u514d\u53d7\u6076\u610f\u653b\u51fb\u548c\u672a\u7ecf\u6388\u6743\u7684\u8bbf\u95ee\uff0c\u4e86\u89e3\u5e76\u6b63\u786e\u4f7f\u7528\u4e00\u4e9b\u91cd\u8981\u7684\u547d\u4ee4\u662f\u81f3\u5173\u91cd\u8981\u7684\u3002\u672c\u6587\u5c06\u4ecb\u7ecd\u51e0\u4e2a\u5e38\u7528\u7684\u547d\u4ee4\uff0c\u7528\u4e8e\u52a0\u5f3aLinux\u670d\u52a1\u5668\u7684\u5b89\u5168\u6027\uff0c\u5e76\u63d0\u4f9b\u76f8\u5e94\u7684\u4ee3\u7801\u793a\u4f8b\u3002 \u7f51\u7edc\u5b89\u5168\u547d\u4ee4 1.1 iptables\uff1a\u8fd9\u662f\u4e00\u4e2a\u975e\u5e38\u5f3a\u5927\u7684\u7f51\u7edc\u5b89\u5168\u547d\u4ee4\uff0c\u7528\u4e8e\u914d\u7f6eLinux\u670d\u52a1\u5668\u7684\u9632\u706b\u5899\u3002\u901a\u8fc7\u4f7f\u7528iptables\uff0c\u6211\u4eec\u53ef\u4ee5\u5b9a\u4e49\u54ea\u4e9b\u7f51\u7edc\u8fde\u63a5\u662f\u5141\u8bb8\u7684\uff0c\u54ea\u4e9b\u662f\u7981\u6b62\u7684\u3002\u4e0b\u9762\u662f\u4e00\u4e2a\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u7981\u6b62\u6240\u6709\u7684\u8f93\u5165\u8fde\u63a5\uff0c\u53ea\u5141\u8bb8\u67d0\u4e2a\u7279\u5b9aIP\u5730\u5740\u7684\u8fde\u63a5\u3002 iptables -P INPUT DROP iptables -A INPUT -s \u5141\u8bb8\u7684IP\u5730\u5740 -j ACCEPT 1.2 tcpdump\uff1a\u8fd9\u662f\u4e00\u4e2a\u7f51\u7edc\u5206\u6790\u547d\u4ee4\uff0c\u7528\u4e8e\u6355\u83b7\u548c\u5206\u6790\u7f51\u7edc\u6d41\u91cf\u3002\u5b83\u80fd\u591f\u5e2e\u52a9\u6211\u4eec\u68c0\u6d4b\u548c\u6392\u67e5\u53ef\u80fd\u7684\u7f51\u7edc\u5b89\u5168\u95ee\u9898\u3002\u4e0b\u9762\u662f\u4e00\u4e2a\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u4f7f\u7528tcpdump\u6355\u83b7\u6240\u6709\u8fdb\u5165\u670d\u52a1\u5668\u7684SSH\u8fde\u63a5\u3002 tcpdump -i eth0 port 22 \u7528\u6237\u7ba1\u7406\u547d\u4ee4 2.1 adduser\uff1a\u8fd9\u4e2a\u547d\u4ee4\u7528\u4e8e\u6dfb\u52a0\u65b0\u7528\u6237\u8d26\u6237\u3002\u5728Linux\u670d\u52a1\u5668\u4e2d\uff0c\u4e3a\u6bcf\u4e2a\u7528\u6237\u5206\u914d\u72ec\u7acb\u7684\u8d26\u6237\u5e76\u9650\u5236\u4ed6\u4eec\u7684\u6743\u9650\u662f\u81f3\u5173\u91cd\u8981\u7684\u3002\u4e0b\u9762\u662f\u4e00\u4e2a\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u4f7f\u7528adduser\u547d\u4ee4\u521b\u5efa\u4e00\u4e2a\u65b0\u7528\u6237\u3002 adduser \u65b0\u7528\u6237\u540d 2.2 usermod\uff1a\u8fd9\u4e2a\u547d\u4ee4\u7528\u4e8e\u4fee\u6539\u73b0\u6709\u7528\u6237\u8d26\u6237\u7684\u8bbe\u7f6e\u3002\u901a\u8fc7usermod\uff0c\u6211\u4eec\u53ef\u4ee5\u4fee\u6539\u7528\u6237\u7684\u5bc6\u7801\u3001\u7528\u6237\u7ec4\u3001\u4e3b\u76ee\u5f55\u7b49\u3002\u4e0b\u9762\u662f\u4e00\u4e2a\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u4f7f\u7528usermod\u547d\u4ee4\u5c06\u4e00\u4e2a\u7528\u6237\u6dfb\u52a0\u5230sudo\u7ec4\u3002 usermod -aG sudo \u7528\u6237\u540d \u6587\u4ef6\u548c\u6743\u9650\u7ba1\u7406\u547d\u4ee4 3.1 chmod\uff1a\u8fd9\u4e2a\u547d\u4ee4\u7528\u4e8e\u4fee\u6539\u6587\u4ef6\u6216\u76ee\u5f55\u7684\u6743\u9650\u3002\u5728Linux\u670d\u52a1\u5668\u4e2d\uff0c\u9650\u5236\u6587\u4ef6\u548c\u76ee\u5f55\u7684\u8bbf\u95ee\u6743\u9650\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002\u4e0b\u9762\u662f\u4e00\u4e2a\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u4f7f\u7528chmod\u547d\u4ee4\u5c06\u4e00\u4e2a\u811a\u672c\u6587\u4ef6\u8bbe\u7f6e\u4e3a\u53ea\u6709\u6240\u6709\u8005\u53ef\u4ee5\u6267\u884c\u3002 chmod 700 \u811a\u672c\u6587\u4ef6\u540d 3.2 chown\uff1a\u8fd9\u4e2a\u547d\u4ee4\u7528\u4e8e\u4fee\u6539\u6587\u4ef6\u6216\u76ee\u5f55\u7684\u6240\u6709\u6743\u3002\u901a\u8fc7chown\uff0c\u6211\u4eec\u53ef\u4ee5\u5c06\u6587\u4ef6\u6216\u76ee\u5f55\u7684\u6240\u6709\u8005\u548c\u6240\u5c5e\u7528\u6237\u7ec4\u4fee\u6539\u4e3a\u6307\u5b9a\u7684\u7528\u6237\u548c\u7ec4\u3002\u4e0b\u9762\u662f\u4e00\u4e2a\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u4f7f\u7528chown\u547d\u4ee4\u5c06\u4e00\u4e2a\u76ee\u5f55\u7684\u6240\u6709\u6743\u4fee\u6539\u4e3a\u67d0\u4e2a\u7528\u6237\u3002 chown -R \u7528\u6237\u540d \u76ee\u5f55\u540d \u65e5\u5fd7\u7ba1\u7406\u547d\u4ee4 4.1 tail\uff1a\u8fd9\u4e2a\u547d\u4ee4\u7528\u4e8e\u67e5\u770b\u65e5\u5fd7\u6587\u4ef6\u7684\u5c3e\u90e8\u5185\u5bb9\u3002\u901a\u8fc7\u4f7f\u7528tail\uff0c\u6211\u4eec\u53ef\u4ee5\u5b9e\u65f6\u67e5\u770b\u65e5\u5fd7\u6587\u4ef6\u7684\u6700\u65b0\u66f4\u65b0\u3002\u4e0b\u9762\u662f\u4e00\u4e2a\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u4f7f\u7528tail\u547d\u4ee4\u67e5\u770b\/var\/log\/auth.log\u6587\u4ef6\u7684\u6700\u540e10\u884c\u3002 tail -n 10 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